Re: [cecd-devel] cec for OMAP4

[Pete B. <pb...@gm...>]

Hello Henry,

On 2011.08.12 19:50, hong zhang wrote:
> May I use current cec package for OMAP4 HDMI CEC with kernel 2.6.35 or higher?

The current libcec and cecd should work with kernel 2.6.35. They are not 
tied to a specific kernel version. However they have only been tested 
against 2.6.12, as this is the only kernel for which we have a custom 
CEC driver (Realtek one).

Please be aware that the official Linux kernel does not include any 
HDMI-CEC driver at the moment, as these are very hardware specific and 
are mostly found on SoCs that have no yet been integrated to mainline.

> If so, what should be modified to fit CEC in TI OMAP4?

If TI provides an HDMI-CEC driver, then you will need to add a backend 
for that driver in libcec, similar to what is done in the 
libcec/linux_realtek_soc.c file. Please have a look at that file, as it 
should provide hints at what you need to do to add support for a non 
Realtek CEC drivers. Once you have that, you should be able to use 
libcec/cecd.

Also be mindful that it's not because a device has an HDMI port that it 
will support HDMI-CEC, as many manufacturers choose not to implement 
that feature. Do you have information indicating that the OMAP4 does? 
Has TI released a kernel source code that includes an HDMI-CEC driver?

Regards,

/Pete